<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="../../JavaScript/jQuery.js"></script>
  <script>
    $(function () {
      $('li:odd').css('backgroundColor','yellow');
      $('li:even').css('backgroundColor','red');
    });
  </script>
</head>
<body>
  <ul>
    <li>岳</li>
    <li>婷</li>
    <li>婷</li>
    <li>董</li>
    <li>喜</li>
    <li>炜</li>
  </ul>
</body>
</html>